I have seven young chickens--14-17 weeks old. Treated for round worm a few weeks ago after seeing a couple worms in the poop, since then, no longer seeing worms but have noticed some yellow foamy dropping but also a lot of "normal" droppings so though it was probably cecal. This morning found this on the droppings board under the roost. Looked over each chicken to see if there was any trauma, but since I didn't find any injuries figure it is likely bloody excrement. All birds are looking fine, have been out in the yard foraging, all seem to be eating and drinking. Debating on treating with Corid given the amount of blood after reading several forums, or just waiting and watching. Any advice is appreciated.